Alert archive / Louisiana / Mesoscale Discussions in 2024

Mesoscale Discussion 22

January 8, 20244 states

The Storm Prediction Center issued this mesoscale discussion at Jan 8, 2024, 7:03 PM CST for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Jan 8, 2024, 7:03 PM CST (01:03 UTC)
Expired: Jan 8, 2024, 9:00 PM CST
In force: 117 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 2

All 35 counties

Baldwin County, AL, Escambia County, AL, Mobile County, AL, Escambia County, FL, Santa Rosa County, FL, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 102 km from the middle of the area, began a volume at 01:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 3Jan 8, 8:40 PM CST

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.1 hours before the alert went out and 49 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 1205 m²/s²
0-3 km storm-relative helicity: 1723 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 8, 8:42 PM CST	Tornado Watch	SPC	Baldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more	11 hr
Jan 8, 11:57 PM CST	Mesoscale Discussion	SPC	Baldwin, Clarke, Mobile, Washington	93 min
Jan 9, 2:44 AM CST	Mesoscale Discussion	SPC	Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more	2 hr
Jan 9, 5:36 AM CST	Mesoscale Discussion	SPC	Barbour, Bullock, Coffee, Covington, Crenshaw, Dale and 7 more	3 hr
Jan 9, 6:07 AM CST	Tornado Watch	SPC	Barbour, Coffee, Dale, Geneva, Henry, Houston and 1 more	7 hr
Jan 9, 9:05 AM CST	Mesoscale Discussion	SPC	Franklin, Gadsden, Hamilton, Jefferson, Lafayette, Leon and 5 more	85 min
Jan 9, 9:45 AM CST	Mesoscale Discussion	SPC	Baker, Bradford, Clay, Duval, Nassau, Putnam and 2 more	2 hr
Jan 9, 10:41 AM CST	Tornado Watch	SPC	Alachua, Baker, Bradford, Clay, Duval, Flagler and 5 more	6 hr
Jan 9, 11:42 AM CST	Mesoscale Discussion	SPC	Citrus, DeSoto, Hardee, Hernando, Hillsborough, Lake and 12 more	2 hr
Jan 9, 12:15 PM CST	Tornado Watch	SPC	Brevard, Charlotte, Citrus, DeSoto, Hardee, Hernando and 15 more	7 hr
Jan 9, 12:16 PM CST	Mesoscale Discussion	SPC	Baker, Bradford, Clay, Columbia, Duval, Hamilton and 4 more	89 min
Jan 9, 2:34 PM CST	Mesoscale Discussion	SPC	Citrus, Clay, Duval, Flagler, Hernando, Hillsborough and 9 more	86 min
Jan 9, 5:48 PM CST	Mesoscale Discussion	SPC	Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 9 more	87 min
Jan 8, 8:07 PM CST	Mesoscale Discussion	SPC	Acadia, Iberia, Lafayette, Saint Landry, Saint Martin, St. Mary and 1 more	53 min

Nearby

Mesoscale Discussions in Louisiana, 2024 Mesoscale Discussions in Mississippi, 2024 Mesoscale Discussions in Alabama, 2024 Every mesoscale discussion in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.